Siri ebidta

Ok - Anytime I go near some SIRI type stock site, they are always talking about EBIDTA. I think I heard Relmor use the term, I figure that guy with the mullet uses it and people pay him for analysis. People use the term here all the time. For once and for all, someone please tell me what the hell EBIDTA is, how you calculate it, how you generate buy and sell signals from it, and what's an average win/loss ratio using it.